Lister Petter Manifold adaptor 202-38721, fits TR and TS 2 and 3 model engines that are using the Cooper style air cleaner Kolberg-Pioneer DeCarbonizing gasket set for Lister

DeCarbonizing gasket set for  Lister Petter AD1 engine

This will be item number 27 in the drawing

The important thing to verify is the orientation of the inlet and outlet of the fuel pump and making sure its the same as yours

This will be item number 7 in the Lister Petter drawing

201-41970 seal for the remote oil filter adapter used on a TS/TR engine

Lister Petter Manifold adaptor 202-38721, fits TR and TS 2 and 3 model engines that are using the Cooper style air cleaner Kolberg-Pioneer DeCarbonizing gasket set for Lister202 38721 manifold adapter this adapter is used with the Cooper style air cleaner housing. This will be item 13 on the Lister Petter drawing